QualityParts From Oregon That you can depend on. Center hole: 3/8": Requires 2 blades for 38" deck for bagging; Requires 1, 98-044 blade and 1, 98-043 blade for 1986-1996 non-bagging operations; Replacement for right-hand side; Enhanced mulching for bagging and discharge efficiency; Stays sharp and durable for longer; Replacement for major brand: MTD Oregon Equipment Parts 98-044 Blade Mtd 942-0473A 19-5/16I